.pt-lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.pt-lightbox-overlay.active {
    opacity: 1;
}

.pt-lightbox-img {
    max-width: 90%;
    max-height: 85%;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.pt-lightbox-img.loaded {
    opacity: 1;
}

.pt-lightbox-spinner {
    display: none;
    position: absolute;
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.25);
    border-top-color: #fff;
    border-radius: 50%;
    animation: pt-spin 0.8s linear infinite;
}

.pt-lightbox-overlay.loading .pt-lightbox-spinner {
    display: block;
}

@keyframes pt-spin {
    to { transform: rotate(360deg); }
}

.pt-lightbox-close,
.pt-lightbox-prev,
.pt-lightbox-next {
    position: absolute;
    color: #fff;
    cursor: pointer;
    user-select: none;
    opacity: 0.75;
    transition: opacity 0.15s ease;
}

.pt-lightbox-close:hover,
.pt-lightbox-prev:hover,
.pt-lightbox-next:hover {
    opacity: 1;
}

.pt-lightbox-close {
    top: 20px;
    right: 30px;
    font-size: 40px;
    line-height: 1;
}

.pt-lightbox-prev,
.pt-lightbox-next {
    top: 50%;
    transform: translateY(-50%);
    font-size: 60px;
    line-height: 1;
    padding: 0 20px;
}

.pt-lightbox-prev { left: 10px; }
.pt-lightbox-next { right: 10px; }

body.pt-lightbox-open {
    overflow: hidden;
}

@media (max-width: 600px) {
    .pt-lightbox-prev,
    .pt-lightbox-next {
        font-size: 40px;
        padding: 0 10px;
    }
    .pt-lightbox-close {
        top: 10px;
        right: 15px;
        font-size: 32px;
    }
}